Have you ever tried a "Mouse" type pattern ?
If so, what fish did you target ?

Tried one the other day, that I was given long time back, but
never used & had tremendous results with Smallmouth. It was
a little Deer Hair type with a leather shoe lace tail. The Smallie
I hooked just nailed it hard.

Does anyone have any good typed up pattern for these ? Or
do you know a good website that may show step-by-step
photos with instructions ? I've not had a lot of tying time
doing Deer Hair flies.

I've never fished an actual mouse fly, but I used to fish dark Dahlberg's with a long rabbit strip tail all the time at night. That's pretty close to being a mouse pattern. Not sure I know of any fly that will get hit that hard.